1 files changed, 37 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/cacheir/typedarray-non-int32-index-has.js b/js/src/jit-test/tests/cacheir/typedarray-non-int32-index-has.js
new file mode 100644
index 0000000000..47eda321ad
--- /dev/null
+++ b/js/src/jit-test/tests/cacheir/typedarray-non-int32-index-has.js
@@ -0,0 +1,37 @@
+function has(k) {
+  // Different typed array types to ensure we emit a HasProp IC.
+  var xs = [
+    new Int32Array(10),
+    new Int16Array(10),
+  ];
+
+  // Doesn't read values from the prototype chain.
+  Object.prototype[k] = 1;
+
+  for (var i = 0; i < 100; ++i) {
+    var x = xs[i & 1];
+    assertEq(k in x, false);
+  }
+}
+
+// Make sure we use a distinct function for each test.
+function test(fn) {
+  return Function(`return ${fn};`)();
+}
+
+// Negative numbers values aren't int32 indices.
+test(has)(-1);
+test(has)(-2147483648);
+test(has)(-2147483649);
+
+// Int32 indices must be less-or-equal to max-int32.
+test(has)(2147483648);
+
+// Int32 indices must not have fractional parts.
+test(has)(1.5);
+test(has)(-1.5);
+
+// Non-finite numbers aren't int32 indices.
+test(has)(NaN);
+test(has)(-Infinity);
+test(has)(Infinity);